v1.6.10 SMS restore problem!!

i restore my sms using MIUI backup but turn out the recipient and my conversation got seperated into 2 different conversation....guys..any way to solve this??

Update: the apps separate the conversation due to the prefix of the contact number....both of them are same person but the number i send out is following my contacts list while the received got my country code prefix...guys could anyone help on this issue?? and i have add on 2 numbers in one contact but no changes..it is annoying and i beg anyone to help on this issue...